| 摘要 |
A peel seal zipper tape for reclosable plastic bags or packages includes a first (14) and a second (16) mutually interlocking zipper profile disposed on a top surface of a laminated film strip (12). The top surface is formed by a layer (20) of a sealant material. The laminated film strip (12) also has a middle layer (24), or core, of a material stiffer than the first and second mutually interlocking zipper profiles (14,16), and may also have a bottom layer of a sealant material (26). In use, the laminated film strip (12) is folded over, and the zipper profiles (14,16) are interlocked with one another. In doing so, portions of the top surface of the laminated film strip (12) face inwardly, so that the folded film strip may be closed with a heat seal. The outside of the folded peel seal zipper tape, that is, the bottom layer (26) of sealant material is bonded to plastic sheet material (25) from which reclosable plastic bags or packages are made. In the production of the bags or packages, the mutually facing portions of the laminated film strip (12) are sealed together. The resulting seal gives a visual indication of having been broken when initially opened. <IMAGE> <IMAGE> |
